+Time
+SndfileContent::length () const
+{
+ shared_ptr<const Film> film = _film.lock ();
+ assert (film);
+
+ return film->audio_frames_to_time (audio_length ());
+}
+
+int
+SndfileContent::output_audio_frame_rate () const
+{
+ shared_ptr<const Film> film = _film.lock ();
+ assert (film);
+
+ return film->dcp_audio_frame_rate ();
+}